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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b8853b6422112bc28890b1a3a459a1daae5ccd460134f9c451a3957be55f6c8' 
  AND token = 'Xx6jkbiFuRC0HCU6dI7nOVszsF1R+T/5C56fNUBbDyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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