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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14013a56ccb5f2820e844e1b60ea162874d4881b35cdb02971ef8d99426385d7' 
  AND token = 'MzvwOmQhXlCad4cjzq8rK3nOgRv5L1R6I8K27fTHKQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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