Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec94625d261274333777ed49ecee218eb526d93173d0db2fad5a28049246b88f' 
  AND token = 'Dt/Jk0OWQ5ZZGJ2E6TypS6oQ7ySKSxVwMcdkxedqHec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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