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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd0cc8e0f20b3e2f021c3b0ca889c8f8cfd78343b2e0dc57743c55f7ce70062' 
  AND token = 'dEyHUlvs9VM/MaYZKyUwPSJff1jAo99t1iehpZxn8k8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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