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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e3f14d98de4bde7a72794c3c1872818f1a8d357692d38e40303f061a663e603' 
  AND token = '6i1iurunrXFFkL6yW2Fbp/RdW/GuOyIPVMtGIaQRyvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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