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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eed00fafe3c27d0afbcbc30bfc1f9c0fef14d946173297354f2b2681c14de9af' 
  AND token = 'vIK2Ab1jA8ws59uK/e75/XD/Hvd1Jml64JRW5RoRlDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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