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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9353eda7b1f66640d18c53866791eeebd3f830bcdb0c8cb57c88c8feb99f05b' 
  AND token = 'oxy1LV6bJUEsAXfNZQ+wFh7oe2JJxkCssdpW439yl00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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