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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cea761bf61a3e6de77a7c249c214bbfb7be85e3f35676f89e92a159bac65bf8e' 
  AND token = '1X9btoSEl3Fblkld9iZu7BdL6WgJvVBU7+GUIz1kNcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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