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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e634d215f606e258b6ff5d87172eecbe7145338afad8aa12f2205e3ed9277d3a' 
  AND token = '22VKF3JYpD24wYfKbdjCjCMmEHrnNFj/0a9kZ7JtwoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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