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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1a48a629420cade7b489dc450135899a7fd6e711f5a2372ec1dce44eef95592' 
  AND token = 'aYM4C5b2cPJrUECMcq0C0zWs49AAGD51EHidCshyc8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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