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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '669928ae02d05974f18de4a8ee4d2cd52aa9fb60ef7387552ba84609445d2733' 
  AND token = 'v360knOSS44HByLJE4l/le9LO/RJ0Tl/wEaWK0OBHyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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