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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c72aaea9a04128e889cd5c0a2e1f1b135200ae0ea4ca9ef4637fd2b6f62443e7' 
  AND token = '4+rle+q62k5u5ab+TVP4IUlxBls4b02Udj0/kCk+f90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00121

JSON explain

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