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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb56fcf21fdd5bc219bd98c337e2ce6ff0c316b3bf67533eb5fe2a0732b4a124' 
  AND token = 'A/0zV9NEcKxVWSZP4povEsOKIa2C4+SYEEDe1KYWJ0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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