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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e07e2aecabc590f9f25e9fc13a6cf3e34beaf50ecbecd92466ec6cdf65643607' 
  AND token = '4kuccZw0kCQA4l8jFirgsO/zskM16U1e79TI3vHvXZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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