SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7f8b96e4a828069652b22f91c44634508a827188ce22dbb91f31eb9d695ccef' 
  AND token = '+sV2ll5+vyXoyV5chjm0va1Q6dB1qKwh3IxHMFuNU3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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