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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cead7a5c5879a7b9b106b00274f7dd4d67a19368880e8762637aec66bed0decc' 
  AND token = '9K5TeTUSAeEHz470ZVTUjLZaKKSBijxoTh6I6Ay7W/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}