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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de006ea3e286ec5c30f8852141ee639873f631c6c0211ca5dd7d84feba0d7d6e' 
  AND token = 'q+06zcTe2emy/uFtrvyoMCO0zYi3od/Y54f4XZ1ccEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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