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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2475737f4a75e290807762be5db665f793fcaef7d9dc0b83e8be13cdabb83dc9' 
  AND token = 'oNd/h0qg5wMN7Y6hSEDZS1gctOd3kkclA56Sd7sMDzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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