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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60cf0ff6e24b43861e3167f0c81a3fc1fdc5f90ee13ed6a0dc75ae6ba3755022' 
  AND token = 'k9iCM9JdjPDxCnCSMlq5ZfMQ26xjaCHxvoUyh3RvAcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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