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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f347c1019bbd74586adc2b8f05969a7dcc513b816d86a18fa4b61f703c16edb4' 
  AND token = 'VA7zsjOebgEMD3m8cxv94/quj/wr0TUlhB6y49c/hVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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