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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'abb0eb4a2a2315a5fe2dd73018217ffd1414fa8d99b9f776218d6e44c2425ca6' 
  AND token = 'HF5L6JC5vd5rxbQqDOv5c2i/3pbinlVtqEQLY09KrSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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