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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d0bd24e06ec5d06f25fde70c8471df0744c66e36ca81c116bd09520a8491f0a' 
  AND token = '2vGz4Tugs+sdxcv2C9/udeAbV5yRRYGSIn8gaNtm/e4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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