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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f64d481572c11506c708dc7cc54a52662b4a1fb725284325879932d3c83375e8' 
  AND token = 'EJpsyYiqGU4kWaM74UQ33pIu/apuGX1+qlq3xYC5YGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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