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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07e58d5904bab46b4ef9db8fb132cc213ec1ed45cb38d0a1cf8931f091ec895e' 
  AND token = 'J02X8ZjpxZZTZ+gHWrRryWZ6eKPqPA5YyDDCn5GHgP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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