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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0e0c4f680ada0d568e75dfc1411b277fb7dca52d5d43aef11979f81f72dba01' 
  AND token = 'V9hrnG0H/DFEPsRwjSUU0WttNCgJmP21BzV6/b1cre8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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