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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02382f39734a049305576d1f2b92e17a011ecdb5a319dca98cea6bd3db88de32' 
  AND token = 'morJWUuOT5sk2YfpevYcMsuFKAEFPd84/ZqT7lCeqjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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