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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3b5adb200b486508ab3c5d60f8372913190be2d85b5bbef7ee4b1b60e6ff662' 
  AND token = 'foqmrPWkbvLTtY3QgFLTex1a+vg3Y4gG8dA5eK4wgiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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