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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cda5a9f2ef52b0f7a1781d046514cd553c00f725f7662dd24018eb1954a2bb1' 
  AND token = 'wvZNWKHg8DZOunJTPC1o0Abw+8cWtq5jCe1trgLXdNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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