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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e206d931a1bd0caebba85b14719118dabc075b03026df7484cd6e179e4f4deb1' 
  AND token = 'WwbLpK8B0+UE7BBN1VT1TEOdFl+HgEAtY4x7khtVyXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00117

JSON explain

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