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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '03c95c1318667b09d8d51766259afc5361ab02d3c10eac4e1e0f0a6a5b144162' 
  AND token = 'lh/q3Y6sgFp4q17tELTAPiuNJ3c6h4LlyDgKUHaB2Yc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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