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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a2824c235dcd1fc7c9291107cdd31d125e8c439c4ad294711cd28a34bd29e91' 
  AND token = 'cYq5h4/35tSTRdDsFvKnJt5ib993Fxt1+ogKbJ5pGPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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