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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c6a78bacb2c4e59cfc0820646aacc5034c8288adc9e0a0af58cf07758a87dee3' 
  AND token = 'GB0DHHetz9/Q+KSC2Hx+QQyxq9YFj2lxQv7aOcpG8Tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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