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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2f8f6f5bac1f94930540fd153d4e007ef9b1dcd5ab8c8c174240ef260226330' 
  AND token = 'kHOg7y2P/sdih7SKn+1DlL7cFX/nV34ErV+e9M3BPSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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