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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59159eec8d1c19b1ec0d9d5ab57cb82114588809732d45cb5c22b887fa5369e0' 
  AND token = 'XkhlMnsDtrlCQcdPKVUlhe4u3iPBUCinNVfNvLw8Y7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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