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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e67aaf9fede0e7c92bb4f574b532e74631fa25df3737886f4b810131703686fd' 
  AND token = 'ub9Ew3OWzASGt2U9A/xJSWb7dHPCRJXWVxqnPdbNGzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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