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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe06baa4b3fcc0b7bf151b7dfdd7d932403f36ddb4dd1f03a0011ae2d7758d5e' 
  AND token = 'ysJ9TYQH3mP0wVwv5D5/4ml4ZOW3HSMyYXjQCQPL6w0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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