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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7205a6ba1769cba90272ce8cfa8df51bb9b3e73ab80a5565cdcbf2d5e18ebe2a' 
  AND token = 'EDFzbgKCK49uu4/7IlWjiFig5x3mgFxaN/9na26uU14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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