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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '33b2e293c0bce8ea95238948cb3e5c39d5c3026a5e59fc09dc94cf607a63ff7a' 
  AND token = 'vui6ru/9feCopWlATNPa5TrNnm6mNh/79X7NPKjR82w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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