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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c11e0753900938bfeb6497117622212acd5f9108c06e7795ab26e7a28de433f' 
  AND token = 'pUcNXW5cPD/WDUJEZmRMGbwgp0ZihFBGZG5GzB5Oc6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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