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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33202a05d9dbc2a6aec78fcaf92bcd510127ec4bd159d4dbae0c264d4c6abba8' 
  AND token = 'JPTNhaG1O+/DbYjB2tiqkSivoJT9IifIk4JobdOWjzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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