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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '081549b364902e41aa10805e6ceb794f7f9e26db3362d45dddb5c30d5c27a35f' 
  AND token = 'Z01+RveAn3y7ZgTdFKmKyySCSneiINn62/9Q9M1mjv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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