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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '032d943215cde9978d8a66553b5e9a8badda3f397229d5b5857378fa40ac05b2' 
  AND token = '7yBlLkL2dx/J3341sVwYnIUW3IVYNlU0Ca2QHhCtdW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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