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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdd509b4e4d8f410adcfed68f9ed7e50c3465416ab9851716a20c50fb903604c' 
  AND token = 'GndmR7rFh0grRF9zxArjVOJLJ2P4J9d7TBdMGnGx8ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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