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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcb8c52babea0b03e5eacaa815c602758f606093f43e37fe84b9ac4ef84b6b68' 
  AND token = 'XxwdGJ5yp83nEUS4Y4+8gHpqH79923PdMcrjyngttxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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