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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32f4f904b342377a1b09c8fd3fb0d1b45f501f48276cf83a76aec25c00db943e' 
  AND token = 'aYR7pfFGYljleJqwYMM7UkNiOJV32J8TetPVYOqQ1uo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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