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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1b1cb8ae346847dcc286b034556ae34d23af7dba1c428e62ead5d9f3f1a95d2' 
  AND token = 'wa86FiA6G4Fy1bIUMNYjaPwg/gj2wXWnOmW4GrQ+YaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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