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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5690a3aec037487649fd5af367a002553cbb2e340e3f1e79a5e0becee880be14' 
  AND token = 'a8f31G+I/z9J/W8EwsA2UYIsMAuUjhiIlJM95xbGeic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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