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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e71883e0def85bfb4ad2bdd660f67821700571a333fb87ab741d88f52183f869' 
  AND token = 'QN3XWgtVz2EsqC6rh6ND4RbpnTteKl6O6gq8VPN05ZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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