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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f74c3be65f56846a55c45c0c187e3bac5804e952f13a5c6cb883baba26998562' 
  AND token = 'LDWnNz5eODSvR9CNo484aXbFtx9epeXStxtoqidZdg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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