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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e468ab6272deb9adb4112037addc30cf69d31b16a0905cb146d5904905e7be13' 
  AND token = 'OzL2ur985C6jGN2DwogpAnOyWhYXtAvxIOrDTP/gKCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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