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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '010b014004988b3dc1da6bf14f254d07c240f5cb86949871de99422d4635994e' 
  AND token = 'DA1flXt5w4mNUT6B6/4Od2v28OEb+t3b9adggc2nd1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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