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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eded15c589bae778f35da5b2a1633b8247e3d6d5f864dbbe8aa27a4558b475cf' 
  AND token = 'TPFEoYsa6sPsIjv/cJSauOPA+27+NQWyJ/g53O9EvYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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