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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8932b8e66fe5298d905f26e2c45e64835bf6d0bd2c30fbb279a6bd5815f445c8' 
  AND token = 'mYTvlhWb0VSOQGZH+KT7Andc5YRN+kaen146H6Lwhbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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