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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a6d41639660c461e7618ada8fb4f4c46dc810ca3e3f477c09d17b556780e7755' 
  AND token = 'ffcQwqx1Uj3NiQzrbT5eQ8y2Z428cCeXGoqiL6f06t4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}